Add cdfs and mask buffers for mrc-tx

These are not currently being used for anything so there is
no impact on performance.

Change-Id: Ida4e0afcc10bee665f8daa379314cd18b3a4ea28
diff --git a/av1/encoder/block.h b/av1/encoder/block.h
index 59f45ee..6b4c354 100644
--- a/av1/encoder/block.h
+++ b/av1/encoder/block.h
@@ -228,6 +228,12 @@
   int partition_cost[PARTITION_CONTEXTS + CONFIG_UNPOISON_PARTITION_CTX]
                     [PARTITION_TYPES];
 #endif  // CONFIG_EXT_PARTITION_TYPES
+#if CONFIG_MRC_TX
+  int mrc_mask_inter_cost[PALETTE_SIZES][PALETTE_COLOR_INDEX_CONTEXTS]
+                         [PALETTE_COLORS];
+  int mrc_mask_intra_cost[PALETTE_SIZES][PALETTE_COLOR_INDEX_CONTEXTS]
+                         [PALETTE_COLORS];
+#endif  // CONFIG_MRC_TX
   int palette_y_size_cost[PALETTE_BLOCK_SIZES][PALETTE_SIZES];
   int palette_uv_size_cost[PALETTE_BLOCK_SIZES][PALETTE_SIZES];
   int palette_y_color_cost[PALETTE_SIZES][PALETTE_COLOR_INDEX_CONTEXTS]